Door latch



June 15 1926. 1,588,946

W. C. DEVEREAUX DOOR LATCH Filed Dec. 8, 1924 if! 5a??? 6. flex area 10:

Patented une 15, 1926.

UNITED STATES PATENT OFFICE.

WILLIAM C. DEYIEBEAUX,1OF DETROIT, MICHIGAN.

DQOR LATCH.

Application filed December 8, 1924. Serial No. 754,684.

This invention relates generally to door locks and latches and refersmore particularly to those designed for use upon the doors of vehiclebodies. I

One of the essential objects of the invention is to provide a look ofthis type in which the bolt is adapted to be retracted by a novel formof roll back that is provided with a rounded end portion for engagementwith the bearin face of the bolt extension so that the retraction of.the bolt from the outside of the vehicle is smoother and easier. ,I

Another object is to provide a pivotal dog that is adapted to render theroll back inoperative by en aging the same to one side of the boltextension and that may be disen gaged from the roll back to permitoperation thereof without extending above the upper edge of the caseplate.

A further object is to provide the dog with an extension that is adaptedto engage the projection on the case plate for limiting the movement ofthe dog in one direction.

Still-anotherob'ect is to provide a strong and durable lock t at issimple and compact in construction and can be manufactured at a comaratively low cost.

Wit the above and other objects in view the invention consists incertain novel features of construction, combinations and arrangements ofparts as will be more fully described and particularly pointed out-inthe appended claims.

In the accompanying drawing;

Figure 1 is a side elevation of a door 100 embodying my invention.

Figure 2 is a sectional view taken on the line 2-2 of Figure 1.

Figure 3 is a sectional view taken on the.

line 33 of Figure 1.

Figure 4 is a section on Fi ure 1.

eretofore, locks have been provided in which the roll backs operablefrom the outside for retracting the bolt have been extended above theusual bolt extensions so that they may be engaged above the boltextensions by suitable dogs for preventing retraction of the bolt fromthe outside of the vehicle. However it has been found that such extendedroll backs did not provide mechanically efiicient bearings against thebearing faces of the bolt extension and that as a result, the outsideoperating means of the lock worked hard when retracting the bolt.Moreover, suchconstructions are obthe line H of I which the rolljectionable because the dogs used to render the roll backs inoperativeusually extended above th e upper edges of the case plates when 1ninoperative position.

With the present invention the objectionable features just referred toare overcome entirely, and I preferably provide a lock in with a lateralprojection that is adapted to be. engaged by the dog when lowered toack-is preferably provided render the roll back inoperative. Thus, the

free end of the roll back may be rounded for engagement with the bearingfaces of the bolt extensions so that the retraction of the bolt from theoutside'of the vehicle will be much smoother and easier. Moreover, the

arrangement is such. that the dog may be responding parts throughout theseveral views, the numeral 1 desi ates a lock embodying my inventionhaving a case plate 2 that is preferably secured to the inner side of adoor and is provided at one edge with a laterally extending flange 4that is secured to the outer edge of the door. Slidably mounted on thecase plate 2 is a bolt 5 preferably having a shank 6 and an enlargedhead 7 As shown, the-head 7 preferabl extends through a suitable opening8 in t e lateral flange 4 ofthe case plate and is ada ted to engage asuitable keeper (not shown, upon the door jamb of the vehicle body,while the shank 6 preferably extends between spaced guide lugs 9preferably struck out from the case plate 2 and is provided at spacedpoints throughout its length with an upstanding extension 10 and alateral pro ection or tongue 11. As shown, this shank 6 is preferablyfiat so that it may move behind a suitable cover plate 12 secured to thecase late 2, while any suitable means such as the helical spring 13anchored preferably on the case plate 2 may be engaged with the rear endof the shank 6 to normally hold the bolt in rojected position.

or retracting the bolt against the tension of thee ring 13 I preferablyprovide a suitable roll back 1% that is adapted to be oper- I ated fromthe outside of the door, and a rotatable spindle that is adapted to beop-.

opening 19 in the hub 16 for rocking the roll back against the extension10 to fetract the bolt.

The rotary spindle 15 is preferably journaled on the case plate 2between spaced struck out bearings 20 and is prevented from movingvertically thereon by a ring 21 that is secured to the spindle 15,preferably at the lower end thereof, and extends through alignedelongated openings 22 and 23 respectively in the case plate 2 and coverplate 12. As shown, this spindle 15 is preferably provided intermediateits ends with a suitable crank portion 24 that engages the lateralprojection 11 of the bolt shank 6. Thus, with this construction, theroll back 14 may be moved to the rear against the extension 10 toretract the bolt without affecting the spindle 15, and the latter may inturn be rotated so that the crank portion 24 engaging the shankprojection 11 will retract the bolt without afiecting the roll back 14.The spring 13 will always exert .a' pressure through the lateralprojection 11 of the bolt shank against the crank portion 24 of thespindle 15. However, a supplemental coil spring 25 is preferablyprovided at the upper edge of the case plate 2- to prevent anyobjectionable play of the spindle '15 and to take care of any rattlingthereof in the bearings 20. As shown, this sprin '25 is preferablycoiled about the spindle-15' and is terminally secured to'the spindleand case plate 2, so that the spindle will always be held snugly in thebearingsi20. In order that the outside operating means may be renderedinoperative from the inside of the vehicle, Ipreferably provide a dog 26that is pivoted on the case plate 2 between the roli back 14 and spindle15and is adapted to prevent the roll back from moving to the rear toretract the bolt. As shown, this dog 26 is preferably rigidly secured toa short horizontal spindle 27 extending through the case plate 2 and isadapted to be actuated by a suitable handle 28 nonrotatably secured tothe s indie.-

lin or er that the dog 26 may be raised or lowered without projectinaboveithe upper edge of the case plate 2, t e dog is preferabiy providedwith an ofi-set portion 29 that projects forwardl at one side of theextension 10 and is adapted to engage a lateral extension or projection30 of the roll back mes es 14. This dog is also preferably provided inrear of the horizontal spindle 27 with a short extension 31 that isengageable with one of the bearings 20. Thus, the movement of the dog 26is entire] independent of the movement of the roll ack 14 and verticalspindle 15. Moreover, when the dog 26 is in o erative position behindthe lateral extens1on 30 of the roll back 14, the vertical spindle 15may be readily operated from the inside of the vehicle to retract thebolt. Furthermore the extension 31 cooperates with the adjacent bearing20 to limit the upward swinging movement of the dog 26. inasmuch as thedog 26 is movable to one side of the shank extension 10 and isengageable with the lateral extension 30 of the roll back, the free endof the latter may be used to bear against the bearing face 34 of theshank extension 10. In order that the retraction of the bolt from theoutside of the door will be smooth, the free end of the roll back 14 ispreferably rounded as shown at 35 for engagement with the bearing face34 of the shank extension 10.

While it is believed that from the foregoing description the nature andadvantages of the invention will be readily apparent, I desire to haveit understood that I do not limit myself to what is herein shown anddescribed, and that such changes may be resorted to when desired as fallwithin the scope of what is claimed.

What it claim as my invention is:

1. In a door lock, the combination with a case plate a cover platetherefor, and a locking bolt tween, said plates, of means for retractingthe bolt including a roll back having an end portion engageable with theextension, said roll back having a lateral projection, and means fordogging the roll back including a member pivoted on one of said platesengageable with said lateral projection.

2. ln a door lock, the combination with a case plate, and a locking boltcarried thereby having an extension, of means for retracting the bolt.including a roll back having a rounded end ortion engageable with theextension and iaving alateral pro'ection, of meansjor rendering the rollback inoperativ'e includin a dog pivoted on the case plate having anod-set portion adapted to engage the lateral projection of the rollback.

3. In a door lock, the combination with a locking bolt having anextension, of means for retracting the bolt including a roll backengageable with the extension, and means for rendering the roll backinoperative including a member engageable with a portion of the rollback at one side of the bolt extension.

4. lin a door lock. the combination with a case plate, and a lockingboltmovable on the case plate having afi extension, of means for having anextension movable beretracting the bolt including a roll back engageablewith the extension, and means for dogging the roll back including amember mounted on the case plate havin an off-set portion adapted tomove beside t e bolt extension and engage directly with a portion of theroll back.

5. In a door lock, the combination with a locking bolt having anextension, of means for retracting the bolt including a roll backengageable with the extension having a lateral projection, and meansenga cable with said projection for dogging sai roll back.

6. In a door lock, the combination with a case plate and a locking boltcarried by. the case plate having an extension, means for retracting thebolt including a roll back engageable with the extension having alateral projection, and a member mounted on the case plate enga eablewith the lateral projection aforesai for rendering the roll backinoperative.

7. In a door lock, the combination with a case plate having spacedbearings thereon,

and a locking bolt carried by the case plate having an extension and alateral projection, of means for retracting the bolt including 'a rollback engageable withthe extension,

and a rotary spindle engaging the bearings on the case plate and havinga portion engageable with the lateral rojection, means for rendering theroll bac inoperative including a member mounted on the case lateengageable with a portion of the roll ack. and means for limiting themovement of said member in one direction including an extension of themember engageable with one of the bearings aforesaid. I

- 8. In a door lock, the combination with a locking bolt havingan'extension, of means for retracting the bolt including a rollbackengageable with said extension, and means for rendering the rollbackinoperativeineluding a pivoted element havin a portion constituting anabutment for tfie rollback movable beside said extension.

In testimony whereof I afli-x my si nature.

WiLLIAM o. DEVEREKUX.

